Shuttle-checking and buffer device for looms



R. RED MAN I. W. PARKINSON AND C. T. WALKER. SHUTTLE CHECKING AND BUFFERDEVICE FOR LOOMS. APPLICATION FILED OCT. I2I I918.

I Patented Oct. 26,1920.

2 SHEETSSHEET I.

R. REDMAN, J. W. PARKINSON AND C. T. WALKER. SHUTTLE CHECKING AND BUFFERDEVICE FOR LOOMS. APPLICATION FILED OCT. 12, 1918.

1,35 ,733, v v Patehted Oct. 26,1920.

2 SHEETSSHEET 2.

ii. S

, FEED STAT PTur ROBERT REDMAN AND JOHN WILLIAM PARKINSON, oronossHI'LLs, NEAR KEIGH- LEY, AND CHARLES TEMPES-I WALKER, OF ROUNDBAY,LEEDS, ENGLAND.

SHUTTLE-CHECKING AND BUFFER FOR LOOlVfS.

Specification of Letters Patent. Patentd flat- 26, 192(} Applicationfiled October 12, 1918. Serial No. 257, 871.

T 0 all whom it may concern:

Be it known that we, ROBERT RnDuAN, J OHN WILLIAM PARKINSON, and CHARLESTnMrEs'r WVALK'ER, subjects of the King of Great Britain, and resident,respectively, of a2 Ryeland street, Crosshills, near 'Kei'ghley, 6 Airestreet, Crosshills, aforesaid, and High Boyd, Davies avenue, Roundbay,Leeds,"all in the county .of York, England, have invented a certain newand useful Improvement in Shuttle-Checking and Buffer Devices for Looms,of which the following description, having reference to the accompanyingdrawings, is a specification.

It relates to means whereby the picker which actuates the shuttle in aloom is checked or arrested in its motion after propelling ortransmitting motion to the shuttle in one direction, while it issimilarly arrested after being movedin the opposite 'direction by theactions of the shuttle entering the shuttle box on its return. In themost common devices heretofore made use of, a considerable quantity ofleather which is comparatively costly has been required while itsresilience is quickly destroyed andtherefore it becomes ineffective. Toavoid the employment of said comparatively large quantity of leathermany devices have already been proposed among which resilient springscarried on rods and otherwise mounted to receive the shock of thepicker, sometimes in one direction and sometimes in the other direction,have been mentioned.

Our present invention consists in the mounting of resilient. springs andtheir guiding spindle in such positions and by devices of suchconstruction or formation as shall enable said springs to act moreefficiently andwithout causing excessive twisting strains on the shortleather straps which are used in conjunction with them, thus enablingsaid straps to withstand the strains put upon them for a greater periodof time and in con unction w th said arrangement devices which willprevent the recoil of the buifer sprin'g which is situated at the outerend of the shuttle-box, from moving orforcing the picker into theshuttle box yet by which devices we may, after the picker has been againoperated to throw the shuttle, release said spring to enablefit to actasa buffer on the return of the shuttle into the shuttle box.

of parts we use tion to a plain loom.

sition s and manner In carrying our invention into effect we Fries.

make use of the devices illustrated by the accompanying sheets ofdrawings to which reference is made in the following descrip- I tionFigure 1 is an end elevation of the rotary shuttle box and laysword of aloom to illustrate the application of our improved devices.

Fig. 2 is a plan of the devices shown by Fig. 1. Fig. 8 is a sectional.end elevation on line A. B. of the parts shown by Fig. 2 and as seen inthe direction indicatedbythe'arrow a. v y

Figs. t and 5 are sectional end elevation and plan respectively of amodified form of our devices hereinafter described Figs. 6 and 7 arealso plan and end elevation respectively of other devices that we maymake use of for certain purposes here inafter explained.

Fig. 8 is'a' drawing in detail of'a part hereinafter described. i Fig. 9shows a modification in the formation of the end'of a buffer strap usedin connection with our improved devices.

Fig. 10 is a front elevation ofparts shown byFig.2.

Figs. 11 and 12 are front elevations of parts hereinafter described, thesame being drawn to an enlarged scale. We have shown our improveddevices as applied to the rotary shuttle box of a loom because theadaptation of picker checking mechanism to 'a'rotary shuttle box is moredifficult of' achievement than is its adapta However our devices, bemounted in the pohereinafter described, may with equal facility andadvantage, be applied to either class of shuttle box. (1 indicates therotary shuttle box and H the laysword of the loom.

To attain the object of our invention the bar or spindle 2 upon whichthe buffer and checking springs 3 and 4 are mounted is supportedby'bearings 5 and ,6 which may be formed integrally with the stud 7 ofthe picker-spindle 9 on the one hand and the framework 8 which supportsthe other'end of said picker spindle 9. Or these supports may be of theshape shown by Fig. lto 7 in which case, the bearing 5 which supports bybeing arranged to the end of the spindle 2 is detachable from p the stud7 as well as being adjustably mounted by its fixing screw taking througha slot in an extension formed upon said stud 7. Or the bearing 5 may beentirely independent of the stud 7' and may be fixed directly upon theupper end of the lay sword H. The bearing 6 is supported by' anotherbearing 6 so that the two partsare both supported by theend frame 8 towhich the part 6 is fixed as illustrated by Figs.

- g 6 and 7. In this casealso the adjustment of thespindle may besecured and its fixing in position maybe efiected'with a punching screw11, such as the one shown by Fig. 3, at one end and the hoop and screw12, l2 as shown by Figs. 1 and 2 on the other end.

When mounting the spindle 2 upon a plain loom the formation of the stud'2' would be the same as that above described that is to say, either asshown by F igs. 1, 2

and 3or as shown by Figs. 4 and 5 whereas the support 6 would be formedto extend from the ordinary plain shuttle-box endcasting or wouldbeshaped to be detachably vmounted thereon but by a -modification in'shape as compared with that shown by 'riedby theoscillations of theslayboard.

.Between the springs 3 and 4 are mounted leather buffer and checkingstraps 13 and 14 which take over the spindles 2 and 9 by an openingbeing made through them at each of their extremities so. that by beingof the length approximately as illustrated by Fig. 2 they may reachalong the spindle 2 and in the opposite direction along the spindle 9 topermit the picker 15 to 'move its full stroke or the stroke necessaryfor throwing the shuttle, while at the same time springs 3 and 4 ofconsiderable length may be used.

This lengthsof spring is desirable because the yielding of said springsby the force of the picker striking. against the leather straps 13 and14 will in such case not be to such an extent as .will damage theirresilience as would be the case provided said springs were shorter.Further than this the straps 13 and 14 are only bent in the directionillustrated by Fig. 2 while they are kept straight in the otherdirection, that is to say, no torsional or twisting strain is put uponthem, hence their durability is greatly enhanced. The straps 13 and 14may be of one thickness of leather, but we preferably have them formedof two or more thin layers stitched together instead of being in onethick piece.

To enable the straps 13 and 14 to slide freely over the spindle 2 wemount upon mounted upon them the straps 13 and 14 may be compressedbetween said nuts and the shoulders w, thus by cutting through the endof thestraps atg beyond the openings therein which take over thethimbles (as shown by Fig. 9) their attachment or detachment from thethimbles and thespindle may be readily efiected.

In order to meet the requirements 01 a heavier or lighter blow of thepicker upon the straps 13 and 14, the springs 3. and 4 may be adjustedin varied positions along the spindle 2 by adjusting their hoops 18 and19 (which are secured upon said spindle 2 by set screws) as will beunderstood;

while in most cases the spring 3 ismade considerably stronger than thespring 4.

It has been .found that on the recoil of the spring 4 the picker 15(after the shuttle has forced it to compress said spring) is moved backinto the shuttle boxG and therefore renders the use of this "spring 4for practical purposes impossible, but to prevent said spring '4 fromthusrecoiling we mount a catch lever 20 upon a bracket 21 fixed upon thespindle 2. V

This lever 20 is'pivoted at20, Fig. 11, and acts un derthe pressure ofthe-spring 23 which always tends to force same into its normalpositionwhich is that shown by the drawings. In this'normal position the outerend of the lever 20 lies in the path of the part 14 of the strap 14which takes over the spindle 2, so that on the shuttle entering theshuttle box and forcing the picker 15 against the strap 14 to compressthe spring 4, said strap .14 will have its outer end 14*. moved beyondthe end of the lever 20 as shown by Figs. wand 11; 'On the strap 14moving over the upper surface-of the lever 20 to reach the outer end ofsame as stated, said lever is made to oscillate upon its fulcrum 20against the pressure of its spring 23. When the strap 14 has movedbeyond the lever 20, the recoil of the spring 23 brings it into theposition hereinbefore described, so that it will thus retain the strap14 and its spring 4. j

When the picker 15 is next moved forward to throw the shuttle, asitapproaches the extent of its motion it encounters. the strap 13andfthis latter'is coupledbya projection on its thimble 16 and a shortstrap 24 to the pendent arm'20 of the lever 20. The motion thus given tothe strap 13 that its outer end is removed from retaining the strap 14and spring 4, hence these latter are permitted to assume their advancedpositions ready to act as means for checking the picker 15 When it nextreturns.

Instead of the lever 20 being employed We may have a sliding piece (seeFig. 12) actuated by a lever 26 to which the strap 24: is secured. Inthis case the spring 23* is mounted beneath the sliding piece 25 Whileby the inner end 25 of same taking against the bracket 21 it is heldagainst rotation.

Such being the nature and object of our said invention, What We claimis 1. In shuttle checking and buffer devices for looms, a pickerspindle, an additional spindle, tWo checking springs mounted on saidspindle, leather straps mounted upon said spindles and interveningbetween the springs, catch devices for retaining the checking spring andmeans for disengaging.

said catch devices.

2. In shuttle checking and buffer devices for looms, a picker spindle,an additional spindle, tWo springs mounted on said spindle, leatherstraps mounted upon said spindles and intervening between the springs,catch devices for retaining one of the springs When compressed, andcoupling means for connecting said catch devices to the buffer strap.

3. In shuttle checking and bufier device v ,7

for looms, a picker spindle, an additional spindle, tWo springs. mountedon said latter spindle, leather straps mounted upon said spindles, apivoted lever, a sliding catch piece and a spring for acting upon saidsliding piece.

ROBERT REDMAN.

JOHN WILLIAM PARKINSON.

CHARLES TEMPEST' WVALKER.

